One vertex per element, one color per generator, with an edge from x to x·s.
(3,4)(7,8)(10,14)(15,16)(17,18,23,25)(19,27,21,24)(20,26,30,22)(28,29,31,32)(1,2,6,5)(3,8,4,7)(9,10)(11,15)(12,16)(13,14)(17,19,23,21)(18,24,25,27)(20,28,30,31)(22,29,26,32)(1,3,6,4)(2,7,5,8)(9,11,13,12)(10,15,14,16)(18,25)(20,30)(24,27)(28,31)(3,4)(7,8)(17,20)(18,26)(19,28)(21,31)(22,25)(23,30)(24,32)(27,29) involution — undirected(1,4,6,3)(2,7,5,8)(9,12,13,11)(10,16,14,15)(17,21,23,19)(18,27,25,24)(20,31,30,28)(22,32,26,29)(1,5,6,2)(3,7,4,8)(17,22,23,26)(18,20,25,30)(19,29,21,32)(24,28,27,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.